README
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first
The "coalesce" helper: first.String(...), first.Int(...), and first.Int64(...) each return the first non-zero/non-empty value from their variadic arguments, or the type's zero value if every argument is empty. Part of rosetta.
Useful for fallback chains — first.String(userValue, configValue, defaultValue). There's nothing subtle here; it's three short loops.
Documentation
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Overview ¶
Package first returns the first non-empty value from a list of candidates.
It exists for the fallback chains that show up all over configuration and display code — use the value the caller passed, otherwise the one on the record, otherwise a hard-coded default — written as a single expression instead of a ladder of if statements. Emptiness means the zero value for the type, and if every candidate is empty, that zero value is what comes back.
Index ¶
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Source Files